The chieftain is an official position on the frontiers of ancient China, first established in the Yuan Dynasty.

It is used to grant titles to leaders of ethnic minority tribes in the northwest and southwest regions.

Toast can be divided into broad and narrow senses. In a broad sense, Tusi not only refers to the governance (Tusi) established independently by the indigenous people in minority areas within their sphere of influence and permitted by national law, but also refers to "the people who own their land, manage their people, and control their troops." A native official who inherits his position from hereditary, rules his place from generation to generation, joins his family in the world, and receives his title from generation to generation." In the narrow sense, chieftains specifically refer to local officials who "have their own land, manage their people, control their troops, inherit their posts, rule their places, join their families, and receive their titles."